version 1.27, 2000/06/20 01:39:44 |
version 1.40, 2001/01/19 15:55:11 |
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* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* All rights reserved |
* All rights reserved |
* Created: Mon Mar 27 02:26:40 1995 ylo |
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* Identity and host key generation and maintenance. |
* Identity and host key generation and maintenance. |
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* |
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* As far as I am concerned, the code I have written for this software |
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* can be used freely for any purpose. Any derived versions of this |
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* software must be clearly marked as such, and if the derived work is |
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* incompatible with the protocol description in the RFC file, it must be |
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* called by a name other than "ssh" or "Secure Shell". |
*/ |
*/ |
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#include "includes.h" |
#include "includes.h" |
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#include "ssh.h" |
#include "ssh.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
#include "fingerprint.h" |
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#include "key.h" |
#include "key.h" |
#include "rsa.h" |
#include "rsa.h" |
#include "dsa.h" |
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#include "authfile.h" |
#include "authfile.h" |
#include "uuencode.h" |
#include "uuencode.h" |
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#include "buffer.h" |
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#include "bufaux.h" |
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#include "pathnames.h" |
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/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
int bits = 1024; |
int bits = 1024; |
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int convert_to_ssh2 = 0; |
int convert_to_ssh2 = 0; |
int convert_from_ssh2 = 0; |
int convert_from_ssh2 = 0; |
int print_public = 0; |
int print_public = 0; |
int dsa_mode = 0; |
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/* default to RSA for SSH-1 */ |
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char *key_type_name = "rsa1"; |
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/* argv0 */ |
/* argv0 */ |
extern char *__progname; |
extern char *__progname; |
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ask_filename(struct passwd *pw, const char *prompt) |
ask_filename(struct passwd *pw, const char *prompt) |
{ |
{ |
char buf[1024]; |
char buf[1024]; |
snprintf(identity_file, sizeof(identity_file), "%s/%s", |
char *name = NULL; |
pw->pw_dir, |
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dsa_mode ? SSH_CLIENT_ID_DSA: SSH_CLIENT_IDENTITY); |
switch (key_type_from_name(key_type_name)) { |
printf("%s (%s): ", prompt, identity_file); |
case KEY_RSA1: |
fflush(stdout); |
name = _PATH_SSH_CLIENT_IDENTITY; |
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break; |
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case KEY_DSA: |
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name = _PATH_SSH_CLIENT_ID_DSA; |
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break; |
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case KEY_RSA: |
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name = _PATH_SSH_CLIENT_ID_RSA; |
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break; |
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default: |
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fprintf(stderr, "bad key type"); |
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exit(1); |
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break; |
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} |
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snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
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fprintf(stderr, "%s (%s): ", prompt, identity_file); |
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fflush(stderr); |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
exit(1); |
exit(1); |
if (strchr(buf, '\n')) |
if (strchr(buf, '\n')) |
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return success; |
return success; |
} |
} |
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#define SSH_COM_MAGIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
#define SSH_COM_MAGIC_END "---- END SSH2 PUBLIC KEY ----" |
#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
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#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
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#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
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void |
void |
do_convert_to_ssh2(struct passwd *pw) |
do_convert_to_ssh2(struct passwd *pw) |
{ |
{ |
Key *k; |
Key *k; |
int len; |
int len; |
unsigned char *blob; |
u_char *blob; |
struct stat st; |
struct stat st; |
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if (!have_identity) |
if (!have_identity) |
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perror(identity_file); |
perror(identity_file); |
exit(1); |
exit(1); |
} |
} |
k = key_new(KEY_DSA); |
k = key_new(KEY_UNSPEC); |
if (!try_load_key(identity_file, k)) { |
if (!try_load_key(identity_file, k)) { |
fprintf(stderr, "load failed\n"); |
fprintf(stderr, "load failed\n"); |
exit(1); |
exit(1); |
} |
} |
dsa_make_key_blob(k, &blob, &len); |
key_to_blob(k, &blob, &len); |
fprintf(stdout, SSH_COM_MAGIC_BEGIN "\n"); |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
fprintf(stdout, |
fprintf(stdout, |
"Comment: \"%d-bit DSA, converted from openssh by %s@%s\"\n", |
"Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
BN_num_bits(k->dsa->p), |
key_size(k), key_type(k), |
pw->pw_name, hostname); |
pw->pw_name, hostname); |
dump_base64(stdout, blob, len); |
dump_base64(stdout, blob, len); |
fprintf(stdout, SSH_COM_MAGIC_END "\n"); |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
key_free(k); |
key_free(k); |
xfree(blob); |
xfree(blob); |
exit(0); |
exit(0); |
} |
} |
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void |
void |
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buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
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{ |
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int bits = buffer_get_int(b); |
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int bytes = (bits + 7) / 8; |
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if (buffer_len(b) < bytes) |
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fatal("buffer_get_bignum_bits: input buffer too small"); |
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BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
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buffer_consume(b, bytes); |
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} |
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Key * |
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do_convert_private_ssh2_from_blob(char *blob, int blen) |
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{ |
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Buffer b; |
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DSA *dsa; |
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Key *key = NULL; |
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int ignore, magic, rlen; |
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char *type, *cipher; |
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buffer_init(&b); |
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buffer_append(&b, blob, blen); |
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magic = buffer_get_int(&b); |
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if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
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error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); |
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buffer_free(&b); |
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return NULL; |
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} |
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ignore = buffer_get_int(&b); |
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type = buffer_get_string(&b, NULL); |
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cipher = buffer_get_string(&b, NULL); |
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ignore = buffer_get_int(&b); |
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ignore = buffer_get_int(&b); |
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ignore = buffer_get_int(&b); |
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xfree(type); |
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if (strcmp(cipher, "none") != 0) { |
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error("unsupported cipher %s", cipher); |
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xfree(cipher); |
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buffer_free(&b); |
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return NULL; |
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} |
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xfree(cipher); |
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key = key_new(KEY_DSA); |
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dsa = key->dsa; |
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dsa->priv_key = BN_new(); |
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if (dsa->priv_key == NULL) { |
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error("alloc priv_key failed"); |
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key_free(key); |
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return NULL; |
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} |
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buffer_get_bignum_bits(&b, dsa->p); |
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buffer_get_bignum_bits(&b, dsa->g); |
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buffer_get_bignum_bits(&b, dsa->q); |
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buffer_get_bignum_bits(&b, dsa->pub_key); |
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buffer_get_bignum_bits(&b, dsa->priv_key); |
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rlen = buffer_len(&b); |
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if(rlen != 0) |
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error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen); |
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buffer_free(&b); |
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return key; |
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} |
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void |
do_convert_from_ssh2(struct passwd *pw) |
do_convert_from_ssh2(struct passwd *pw) |
{ |
{ |
Key *k; |
Key *k; |
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char blob[8096]; |
char blob[8096]; |
char encoded[8096]; |
char encoded[8096]; |
struct stat st; |
struct stat st; |
int escaped = 0; |
int escaped = 0, private = 0, ok; |
FILE *fp; |
FILE *fp; |
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if (!have_identity) |
if (!have_identity) |
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escaped++; |
escaped++; |
if (strncmp(line, "----", 4) == 0 || |
if (strncmp(line, "----", 4) == 0 || |
strstr(line, ": ") != NULL) { |
strstr(line, ": ") != NULL) { |
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if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
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private = 1; |
fprintf(stderr, "ignore: %s", line); |
fprintf(stderr, "ignore: %s", line); |
continue; |
continue; |
} |
} |
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*p = '\0'; |
*p = '\0'; |
strlcat(encoded, line, sizeof(encoded)); |
strlcat(encoded, line, sizeof(encoded)); |
} |
} |
blen = uudecode(encoded, (unsigned char *)blob, sizeof(blob)); |
blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
if (blen < 0) { |
if (blen < 0) { |
fprintf(stderr, "uudecode failed.\n"); |
fprintf(stderr, "uudecode failed.\n"); |
exit(1); |
exit(1); |
} |
} |
k = dsa_key_from_blob(blob, blen); |
k = private ? |
if (!key_write(k, stdout)) |
do_convert_private_ssh2_from_blob(blob, blen) : |
fprintf(stderr, "key_write failed"); |
key_from_blob(blob, blen); |
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if (k == NULL) { |
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fprintf(stderr, "decode blob failed.\n"); |
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exit(1); |
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} |
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ok = private ? |
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PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : |
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key_write(k, stdout); |
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if (!ok) { |
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fprintf(stderr, "key write failed"); |
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exit(1); |
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} |
key_free(k); |
key_free(k); |
fprintf(stdout, "\n"); |
fprintf(stdout, "\n"); |
fclose(fp); |
fclose(fp); |
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do_print_public(struct passwd *pw) |
do_print_public(struct passwd *pw) |
{ |
{ |
Key *k; |
Key *k; |
int len; |
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unsigned char *blob; |
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struct stat st; |
struct stat st; |
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if (!have_identity) |
if (!have_identity) |
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perror(identity_file); |
perror(identity_file); |
exit(1); |
exit(1); |
} |
} |
k = key_new(KEY_DSA); |
k = key_new(KEY_UNSPEC); |
if (!try_load_key(identity_file, k)) { |
if (!try_load_key(identity_file, k)) { |
fprintf(stderr, "load failed\n"); |
fprintf(stderr, "load failed\n"); |
exit(1); |
exit(1); |
} |
} |
dsa_make_key_blob(k, &blob, &len); |
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if (!key_write(k, stdout)) |
if (!key_write(k, stdout)) |
fprintf(stderr, "key_write failed"); |
fprintf(stderr, "key_write failed"); |
key_free(k); |
key_free(k); |
xfree(blob); |
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fprintf(stdout, "\n"); |
fprintf(stdout, "\n"); |
exit(0); |
exit(0); |
} |
} |
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void |
void |
do_fingerprint(struct passwd *pw) |
do_fingerprint(struct passwd *pw) |
{ |
{ |
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FILE *f; |
FILE *f; |
BIGNUM *e, *n; |
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Key *public; |
Key *public; |
char *comment = NULL, *cp, *ep, line[16*1024]; |
char *comment = NULL, *cp, *ep, line[16*1024]; |
int i, skip = 0, num = 1, invalid = 1; |
int i, skip = 0, num = 1, invalid = 1, success = 0; |
unsigned int ignore; |
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struct stat st; |
struct stat st; |
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if (!have_identity) |
if (!have_identity) |
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perror(identity_file); |
perror(identity_file); |
exit(1); |
exit(1); |
} |
} |
public = key_new(KEY_RSA); |
public = key_new(KEY_RSA1); |
if (load_public_key(identity_file, public, &comment)) { |
if (load_public_key(identity_file, public, &comment)) { |
printf("%d %s %s\n", BN_num_bits(public->rsa->n), |
success = 1; |
key_fingerprint(public), comment); |
} else { |
key_free(public); |
key_free(public); |
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public = key_new(KEY_UNSPEC); |
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if (try_load_public_key(identity_file, public, &comment)) |
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success = 1; |
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else |
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debug("try_load_public_key KEY_UNSPEC failed"); |
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} |
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if (success) { |
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printf("%d %s %s\n", key_size(public), key_fingerprint(public), comment); |
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key_free(public); |
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xfree(comment); |
exit(0); |
exit(0); |
} |
} |
key_free(public); |
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/* XXX */ |
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f = fopen(identity_file, "r"); |
f = fopen(identity_file, "r"); |
if (f != NULL) { |
if (f != NULL) { |
n = BN_new(); |
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e = BN_new(); |
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while (fgets(line, sizeof(line), f)) { |
while (fgets(line, sizeof(line), f)) { |
i = strlen(line) - 1; |
i = strlen(line) - 1; |
if (line[i] != '\n') { |
if (line[i] != '\n') { |
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*cp++ = '\0'; |
*cp++ = '\0'; |
} |
} |
ep = cp; |
ep = cp; |
if (auth_rsa_read_key(&cp, &ignore, e, n)) { |
public = key_new(KEY_RSA1); |
invalid = 0; |
if (key_read(public, &cp) != 1) { |
comment = *cp ? cp : comment; |
cp = ep; |
printf("%d %s %s\n", BN_num_bits(n), |
key_free(public); |
fingerprint(e, n), |
public = key_new(KEY_UNSPEC); |
comment ? comment : "no comment"); |
if (key_read(public, &cp) != 1) { |
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key_free(public); |
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continue; |
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} |
} |
} |
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comment = *cp ? cp : comment; |
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printf("%d %s %s\n", key_size(public), |
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key_fingerprint(public), |
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comment ? comment : "no comment"); |
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invalid = 0; |
} |
} |
BN_free(e); |
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BN_free(n); |
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fclose(f); |
fclose(f); |
} |
} |
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key_free(public); |
if (invalid) { |
if (invalid) { |
printf("%s is not a valid key file.\n", identity_file); |
printf("%s is not a valid key file.\n", identity_file); |
exit(1); |
exit(1); |
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struct stat st; |
struct stat st; |
Key *private; |
Key *private; |
Key *public; |
Key *public; |
int type = dsa_mode ? KEY_DSA : KEY_RSA; |
int type = KEY_RSA1; |
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if (!have_identity) |
if (!have_identity) |
ask_filename(pw, "Enter file in which the key is"); |
ask_filename(pw, "Enter file in which the key is"); |
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perror(identity_file); |
perror(identity_file); |
exit(1); |
exit(1); |
} |
} |
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public = key_new(type); |
if (type == KEY_RSA) { |
if (!load_public_key(identity_file, public, NULL)) { |
/* XXX this works currently only for RSA */ |
type = KEY_UNSPEC; |
public = key_new(type); |
} else { |
if (!load_public_key(identity_file, public, NULL)) { |
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printf("%s is not a valid key file.\n", identity_file); |
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exit(1); |
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} |
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/* Clear the public key since we are just about to load the whole file. */ |
/* Clear the public key since we are just about to load the whole file. */ |
key_free(public); |
key_free(public); |
} |
} |
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/* Try to load the file with empty passphrase. */ |
/* Try to load the file with empty passphrase. */ |
private = key_new(type); |
private = key_new(type); |
if (!load_private_key(identity_file, "", private, &comment)) { |
if (!load_private_key(identity_file, "", private, &comment)) { |
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* Try to load the public key from the file the verify that it is |
* Try to load the public key from the file the verify that it is |
* readable and of the proper format. |
* readable and of the proper format. |
*/ |
*/ |
public = key_new(KEY_RSA); |
public = key_new(KEY_RSA1); |
if (!load_public_key(identity_file, public, NULL)) { |
if (!load_public_key(identity_file, public, NULL)) { |
printf("%s is not a valid key file.\n", identity_file); |
printf("%s is not a valid key file.\n", identity_file); |
exit(1); |
exit(1); |
} |
} |
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private = key_new(KEY_RSA); |
private = key_new(KEY_RSA1); |
if (load_private_key(identity_file, "", private, &comment)) |
if (load_private_key(identity_file, "", private, &comment)) |
passphrase = xstrdup(""); |
passphrase = xstrdup(""); |
else { |
else { |
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void |
void |
usage(void) |
usage(void) |
{ |
{ |
printf("Usage: %s [-lpqxXydc] [-b bits] [-f file] [-C comment] [-N new-pass] [-P pass]\n", __progname); |
printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] [-N new-pass] [-P pass]\n", __progname); |
exit(1); |
exit(1); |
} |
} |
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{ |
{ |
char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
struct passwd *pw; |
struct passwd *pw; |
int opt; |
int opt, type; |
struct stat st; |
struct stat st; |
FILE *f; |
FILE *f; |
Key *private; |
Key *private; |
Key *public; |
Key *public; |
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extern int optind; |
extern int optind; |
extern char *optarg; |
extern char *optarg; |
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exit(1); |
exit(1); |
} |
} |
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while ((opt = getopt(ac, av, "dqpclRxXyb:f:P:N:C:")) != EOF) { |
while ((opt = getopt(ac, av, "dqpclRxXyb:f:t:P:N:C:")) != -1) { |
switch (opt) { |
switch (opt) { |
case 'b': |
case 'b': |
bits = atoi(optarg); |
bits = atoi(optarg); |
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break; |
break; |
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case 'R': |
case 'R': |
if (rsa_alive() == 0) |
/* unused */ |
exit(1); |
exit(0); |
else |
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exit(0); |
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break; |
break; |
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case 'x': |
case 'x': |
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break; |
break; |
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case 'd': |
case 'd': |
dsa_mode = 1; |
key_type_name = "dsa"; |
break; |
break; |
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case 't': |
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key_type_name = optarg; |
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break; |
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case '?': |
case '?': |
default: |
default: |
usage(); |
usage(); |
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printf("Can only have one of -p and -c.\n"); |
printf("Can only have one of -p and -c.\n"); |
usage(); |
usage(); |
} |
} |
/* check if RSA support is needed and exists */ |
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if (dsa_mode == 0 && rsa_alive() == 0) { |
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fprintf(stderr, |
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"%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
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__progname); |
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exit(1); |
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} |
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if (print_fingerprint) |
if (print_fingerprint) |
do_fingerprint(pw); |
do_fingerprint(pw); |
if (change_passphrase) |
if (change_passphrase) |
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arc4random_stir(); |
arc4random_stir(); |
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if (dsa_mode != 0) { |
type = key_type_from_name(key_type_name); |
if (!quiet) |
if (type == KEY_UNSPEC) { |
printf("Generating DSA parameter and key.\n"); |
fprintf(stderr, "unknown key type %s\n", key_type_name); |
public = private = dsa_generate_key(bits); |
exit(1); |
if (private == NULL) { |
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fprintf(stderr, "dsa_generate_keys failed"); |
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exit(1); |
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} |
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} else { |
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if (quiet) |
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rsa_set_verbose(0); |
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/* Generate the rsa key pair. */ |
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public = key_new(KEY_RSA); |
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private = key_new(KEY_RSA); |
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rsa_generate_key(private->rsa, public->rsa, bits); |
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} |
} |
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if (!quiet) |
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printf("Generating public/private %s key pair.\n", key_type_name); |
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private = key_generate(type, bits); |
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if (private == NULL) { |
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fprintf(stderr, "key_generate failed"); |
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exit(1); |
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} |
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public = key_from_private(private); |
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if (!have_identity) |
if (!have_identity) |
ask_filename(pw, "Enter file in which to save the key"); |
ask_filename(pw, "Enter file in which to save the key"); |
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/* Create ~/.ssh directory if it doesn\'t already exist. */ |
/* Create ~/.ssh directory if it doesn\'t already exist. */ |
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
if (strstr(identity_file, dotsshdir) != NULL && |
if (strstr(identity_file, dotsshdir) != NULL && |
stat(dotsshdir, &st) < 0) { |
stat(dotsshdir, &st) < 0) { |
if (mkdir(dotsshdir, 0755) < 0) |
if (mkdir(dotsshdir, 0700) < 0) |
error("Could not create directory '%s'.", dotsshdir); |
error("Could not create directory '%s'.", dotsshdir); |
else if (!quiet) |
else if (!quiet) |
printf("Created directory '%s'.\n", dotsshdir); |
printf("Created directory '%s'.\n", dotsshdir); |
|
|
xfree(passphrase1); |
xfree(passphrase1); |
|
|
/* Clear the private key and the random number generator. */ |
/* Clear the private key and the random number generator. */ |
if (private != public) { |
key_free(private); |
key_free(private); |
|
} |
|
arc4random_stir(); |
arc4random_stir(); |
|
|
if (!quiet) |
if (!quiet) |